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How is the flexible budget for direct materials calculated? A. The standard quantity of input per unit times the number of units actually made B. The standard quantity of input per unit times the number of units budgeted times the standard price per unit of input C. The number of units actually made times the standard quantity of input per unit of output times the standard price per unit of input D. The budgeted quantity of units less the standard quantity of units times the number of output units